Stove or furnace.



PATENTED SEPT. 18, 1906.

G. A. RUSOO.

'STOV E OR FURNACE.

APPLICATION FILED D30. 2'1, 1904.

2 SHEETS-SHEET 1.

No. 831,243. v I PATENTED SEPT; 18, 1906.

C A. RUSCO.

STOVE OR FURNACE,

APPLICATION FILED DEO.27,1904.

2 SHEETS-SHEET 1i.

crown on Application time To r'n/llo/mm, it may (Jo/merit:

lie it known that i, (lustrous A. Rosco, a citizen of the United States, rcsiding'at cage, in the county of (look and State of lllinois, have invented new and useful improvements in Stoves or Furnaces, of which the following is a specification, reference being made to the accompanying drawings, forming a. part thereof.

This invention consists in an innu'm'ement adapted for stoves, furnaces, or other like ob jects.

It has the purpose of improving the norm bust-ion and giving more perfect control over the fire.

it consists of the features set out in the claims.

in the drawings, Figure l is a fore-ami--nft vertical section through the tire pot; and ashpit of astove embody g this invention. Fig. 3 in a section at the line 9 on Fig. i. Fig. 3 is a section at the line 3 25 on fig. 1. Fig. l is a detail section at the line -l on Fig. t. Fig. is a detail section at the line 5 5 on Fig. 2.

This improved stove comprises the cue tomary principal elements, coneisting of a base 1, containing the ash pit, the lirepot 4 mounted on the base, and suitable upper elements not concerned in the preeent invention. The lire-pot 2 has in its wall cells i5 extending up and. down and circumferentially distributed throughout the said lirepot wall. These cells communicate with the fuel or lire space of the lire-pot thrtmgli rifts 3, which extend substantially the whole length of the cells from top to bottom ofthe fire-pot, excepting a short distance at the top, having another PUIPOSG hereinafter explained. 'ihese its open at their lower ends at the bottom of the iire-pot freely and without restriction into au annular chamber of construction 'cncompassing the bottom of the tire pot,

which is preferably formed partly in the lower edge or end of the tire-pot and partly in the upper surface ofthe l ase--that is, on the upper side of the upper wall of the ash-pitand for the purpose of so forming; this charm her the lire-pot. has a flaring annular flanges l, forming under it an annular cavity into the upper side of which all the cells 8 3 open freely, as stated, and the base has in the upper surface an annular pocket 5 correspondng to and registering with and matting the annular cavit l of the fire-pot,so that said annular cavity a nd said annular pocket together make up the annular chamber desired,

Specilnmtien of Letters Patent.

I l l A. hillill}, til! Ulllthltit), llililliOlS.

Patented Sept. 18, 1906.

Oer-anlm' 27, 190-1. Serial ll 0. 238,497.

into which all the cells 3 open at their lower enlist At any convenient point, preferably at the rear of the stove or furnace, there is formed in the upper wall or upon the upper side of the base an air-duet 6, of any desired width or circaunfermitial extent, leading into the pocket 5, said air-duct being open and preferably grated at the outer end for free admission of outer air, which thus reaches the annular chamber formed in the pocket 5 and cavity 4, and this annular chamber serves to distribute the air thus derived to the cells 3, through which the air reaches the fire-pot and may be delivered to the tire through the rifts 3 at any point in their height, either against the lire-body or over the fire, accord ing to the depth of the latter in the fire-pot. A small amount of ash is liahleto fall through the rifts 23 into the cells 3 and be discharged t the bottom into the annular air-distributing chamber described, and in order that such ash may not accumulate in this chamber so as to block. up or materially obstruct the same to the extent of cutting off or unduly restricting the air circulation theretlu'ough the bottom of the pocket 5 is constructed so as to permit the discharge of the ashes therefrom periodically, as may be required. A convenient method of accomplishing this is to make the bottom of the pocket gra ted or reticulated. and to apply underneath the same a ctirrespondingly-reticu lated rcgzistor-annulus 7, which may be oscillated a distance equal to the width of the apertures, so as to either close all the apertures or open them all in a familiar manner. In order to most elliciently accomplish the purpose of llischarging the ashes b i this means, the grate-bars 5 of the grated ottom of the pocket 5 are triangular in cross-section, as seen in Fig. 3, with. the apex upward and the flat side downward against the registcrannulus 7, so that the bottom of the pocket has substantially no extent of horizontal surface upon which the ashes may lodge, the bars 7 of the annular register-plate 7 being substantially the only support for the ashes, which are therefore immediately dropped when the register is moved to pass these bars under the triangular grate-bars 5". l

Since it is desired that the air for circulatiou through the annular chamber and to the cells 3 shall be derived from the exterior, and

that the communication of the cells with the I -pit shall be closed during the ordinaryop asl eration'of the stove, I provide that the annular orator releases it.

(lle 5% ol' the annular register which extends 3 5 the base-fingers.

register shall be normally in closed position and shall automaticall return to that posi tion alter being moved for dropping the ashes out oi the annular chamber as soon. as the opi l' orthispurposc thehanout through a suitable slot 9 in the base has secured to one side of it a flat spring 1.0,whose tr e end bears against one end of the slot so 10 that the spring elasticall resists the movement of the handle toward that end and reacts to return it to the opposite end, the position at which the handle is thus normally held by the spring being the closed position of the I 5 register.

The ash-pit 12 in the base 1 has tlhccustom ary opening at the front for retrieving the ashes which pass through the grate 13, which is, in part, the bottom of the fire-pot. This grate is preferably constructed and arranged so that it can be completely closed, and for tlns purpose it comprises radial lingers 13% which alternate with radial apertures, and

the base has at the top i1iwardly-projecting 2 5 radial fingers 1 alternating with corresponding intervals and of width corresponding both to the fingers and to the aperturesjol' the grate so that the grate being adapted to be oscillated about its vertical axis may at one 0 position have its radial apertures completely 40 or other matter too large to pass through the grate-apertures. The handle 14* ol' the plate 14 serves a handle for oscillating the grate to open and close it as described. The ashpit entrance is closed, as usual, by a door 18,

which is provided with draftapertures and a register of familiar construction for regulating or completely cutting oil, as may be desired, the access of air into the ash-pit, and thence through the grate to the fire; but for 5a shutting oil the air from the bottom of the fire the preferable method is toclose the grate in the manner above explained. When the grate is thus closed, all the draft for the fire. will "be derived through the air-duct 6 and 5 5 the annular chamber to which it leads and which supplies the cells 3, and after thefire isstarted this is designed to be the sole source of dratt that is, the grate or the ash-pit draft-register, either or both, will be closed, so

that no air will enter the ire through the grate.

In order to obtain a certain advantage of additional air-supply at the top of the fire as distii'iguished. from the air-supply which may 6 5 pass through the rifts 3 against the lire-body and into the body of coals, such additional airsupp'ly being desirable for the purpose of efi'ecting complete combustion of the gases arising from the coals for which adequate airsupply will not pass through the coals without unduly stimulating the fire, and thereby increasing the generation of gas, .1 provide.

around the top of the fire-pot an annular chamber 15, into which the upper ends of the cells 3 open freely, this chamber being above the level at which the rifts 3) terminate. Preferably the chamber is formed in the casting of the the ot except as to an outer inclosing-wall, w ich is conveniently made of a separate plate 15, secured to the main firepot cas ling in any convenient manner. This annular chamber 15 is supplied with air from the exteriorthrough a register 16 in the outer wall or plate 15 and the air is distributed by means of the annular chamber completely around the top of the fire-pot and it is delivered intothe fire-pot above the lire therein through a multiplicity of small apertures 17 17 17, circumferentially distributed about the top of th'e fire-pot leading from said annular chamber 15. The result of this construction is that the air rising through the cells 3 and being highly heated in its passage, con stituting a supply largely in excess of the discharge which will ordinarily talie olace throughthe rifts 3, fills the annular cramber 15 and being at that point further heated, together with'the additional supply entering from outside through the register 16', is discharged forcibly in jets through the apertures 17 into the volume of in the fire-pot above the fire-body, and thus supplying the proper quantity of oxygen to the combustible gases produces combustion thereof, which causes the air-jets to assume the appearance of flame-jets. A sufficient number of dischargeapertures 17 being provided to correspond with the volume of ii re which the fire pot may contain will cause the combustion of the gases above th fire-body to be substantially perfect and prevent or greatly reduce the visible smoke discharged from the stove.

1 cl aim- 1. In a stove or furnace, the combination of a fire-pot and base, the tire-pot having circun\ferentially-distributed air-cells eXtending up and down in its wall and conununicat- 'ing with the fuel-space, the base containing the ash-pit, and an annular chamber being formed at the junction of the fire-pot and base with which the air-cells of the fire-pot communicate at their lower ends, means normally closing air communication of said annular chamber with the ash-pit, and means for operating said closing means to open such communication at will, said chamber having draft communication with the outer air.

2. In a stove or furnace, the combination of a fire-pot and base, the fire-pot having circumferentially-distributed air-cells extending up ttltl down in its \\':!ti and "nnnnnnicatr ing with the fuel-space, the base having an annular pocket in it top will, said pocket communicating l'rt-elv with the lower ends ol 5 said lire-pot cells; means nornit-d'l r closing air communication of the pocket with the ashpit; means for operating said closing means to open such eommunicat ion at will, and a draltpassage from the outer air leading into such pocket.

in a stove or ft'irnaee, the combination ol" :1 lire-pot and a base, the lire-pot having eircumlerentially-distributed air-cells extending up and down in its well and communieating with its fuel-space, the base containing the ash-pit, and an annular chamber beingt'o'rmed at the junction ol' the tire-not and base with which the air-cells of the lire-pot communicate at, their lower ends, said ann ular chambe'r having at the bottom a movable elosnre cutting ot'l' commnnir-ation ol said ehanrber with the ash-[tit and means for movin; sneh closure at will to open passage for ashes l'rom the chamber into the ash-pit.

4. In a stove or l'urnace, the combination til it lire-pot and a base, the lire-pot having eiremnl'erentiallv-distributt-d air-cells extending up and down in its wall and ennnnu nicating with its fuel-space, the base containing the ash-pit, and an annular chamber being lormed at: the junction of the tire-pot and base with which the air-cells ol" the tire-pot communicate at their lower ends, said annular chamber havin; at the bottom a movable closure cutting otl"communication nl' said chamber with the aslvpit; means holdingsuch closure normality closed, and means for moving such closure at wi l t open passage i'or ashes lrom the chamber into the ash-pit.

in a stove or l'urnare, ltt-(H1llll)ill2tli )h with a lire-pot and base, the lirwpot having eirculnl'erentially distributed air cells e,\- tending up and down in its wall, the base containing the ash-pit, u-ll l an annular chamber 5 bein; l'ormed at the junction ol', the tire-pot and base with which the air-cells ol' the tirepot communicate at their lower ends, said annular chamber having d'ral't communication with the outer air, and means normally Su closing air communimition ol said.chamber with the ash-nit, the tire-pet having an annular chamber at the top into which the aircells opi'n l |'(-t'l at their upper t ads, and a, multinlieitv of apertures t'irr-uml'erenttally disiribnted about the tire-pot leadin; l'rom said annular chamber into the tirwpot cavity at the upper end, and a controlled draft-inlet into said upper annular chamber.

(3. in a stove or furnace, the combination oi a lire-pot and a base, the -lire-pot having, cirmlmlmentiallydistributed air cells extendine up and down in its wall and communicating with the fuel-space substantially throughout their vertical extent, the base containing, an ash-pit, and an annular chamber being formed at the junction of the firepet and base with which said air-cells communicate at their lower ends, said annular chamber having dral't eomnnn'iication with the outer air, and means normally closing air continunimition of said chamber with the ashpit, the tire-pot having also an annular chamher at the upper end into the lower side of I which said tire-pot cells open freely at their upper ends, said annular chamber having communication with the tire-pot cavity at the upper part of the latter by means of amultiplicity of apertures in the lire-pot wall circumlerentially distributed about the tirepot, said upper annular chamber having con.- trnlled draft comnm-nication with the outer air.

7. In a stove or furnace, the combination ol" a lire-pot and base, thefire pot having circuinferentially-dist'ributt-(l air-cells extend.- in; up and down in its wall and communicating with the fuel-space; the base containing the ash-pit, and an annular chamber being l'nrmed at the junction of the tire-pot and base with which the air-cells of the tirepot communicate at their lower ends, said annular chamber having draft communication with the outer air, and means for opening and closing communication of said chamber with the ashpit at will.

ln testimony whereof lhave hereunto set my hand, in the preseneeof two witnesses, at Chicago, Illinois, this 16th day of" December, lJU i. I

CHARLES 'A. RUSCO.

ln prescnce of CHAS. b. Bmt'roN, FREDK. G. FISCHER. 

